The blender has done for margaritas what the automatic transmission did for sports cars. Why do people pay top dollar for high-end tequila, then ask the barkeep to blanderize it with pulverized ice? As Frank Sinatra was prone to say when given more than two cubes in his whiskey tumbler, "What do I look like, a figure skater?" If you want a Slurpee, go to 7-Eleven. If you want an honest margarita -- one with real bite -- head to Richardson's, where there's no blender, or sweet-and-sour mix, to get in the way of a good thing. Richardson's knows the recipe for pure refreshment on a hot summer day: good tequila and fresh-squeezed lime juice with a dash of Triple Sec poured into a glass filled with ice (cubes!) and rimmed with salt. That's it, nothing more. Alter this recipe even a smidgen and you may be drinking a cocktail, but it ain't a margarita.